Measurement of cardiac output by transoesophageal Doppler echocardiography in anaesthetized horses: comparison with thermodilution.
Measurement of cardiac output by transoesophageal Doppler echocardiography in anaesthetized horses: comparison with thermodilution.
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麻醉马经食道多普勒超声心动图测量心输出量：与热稀释法的比较。
DOI：
10.1093/bja/77.6.773
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发表时间：
1996
影响因子：
9.8
通讯作者：
R. Jones
中科院分区：
文献类型：
--
作者：
L. E. Young;K. Blissitt;D. Bartram;R. Clutton;V. Molony;R. Jones
为了确定经食管多普勒超声心动图是否可用于估计麻醉马的心输出量，我们比较了8个健康成年纯种马的热稀释法估计心输出量的技术。采用高脉冲重复频率（HPRF）和连续波（CW）多普勒超声心动图从3.5 MHz经食管探头测量主动脉血流速度。在研究期间，通过给予多巴酚丁胺增加心输出量，通过热稀释法提供的心输出量测量值范围为15.0至64.4 L min-1。与热稀释法相比，CW多普勒得出的估计值高估了心输出量（偏倚= 4.0 L min-1）。HPRF多普勒超声心动图的估计值更接近地反映了通过热稀释法获得的测量值（偏倚= 0.7升/分）。对于两种超声模式，技术之间的一致性限值相似（HPRF = -7.7至9.1升min-1，CW = -4.9至12.8升min-1）。有显着差异的偏见之间的多普勒技术和热稀释个别马。因此，对于任何一匹马，技术之间的一致性限度更接近（HPRF = +/- 6.4升min-1，CW = +/- 7.6升min-1）。我们的结论是，经食管超声心动图提供了一种替代的，有效的和非侵入性的方法来测量麻醉马的心输出量。
In order to determine if transoesophageal Doppler echocardiography could be used to estimate cardiac output in anaesthetized horses, we have compared the technique with estimations of cardiac output by thermodilution in eight healthy adult thoroughbreds. Measurements of aortic blood flow velocity were made by high pulse repetition frequency (HPRF) and continuous wave (CW) Doppler echocardiography from a 3.5-MHz transoesophageal probe. Cardiac output was increased during the study by administration of dobutamine, providing a range of cardiac output measurements by thermodilution from 15.0 to 64.4 liter min-1. Estimations derived from CW Doppler overestimated cardiac output compared with thermodilution (bias = 4.0 litre min-1). Estimations from HPRF Doppler echocardiography more closely reflected measurements obtained by thermodilution (bias = 0.7 litre min-1). Limits of agreement between the techniques were similar for both modes of insonation (HPRF = -7.7 to 9.1 litre min-1, CW = -4.9 to 12.8 litre min-1). There were significant differences in bias between both Doppler techniques and thermodilution for individual horses. As a result, for any individual horse, limits of agreement between the techniques were closer (HPRF = +/- 6.4 litre min-1, CW = +/- 7.6 litre min-1). We conclude that transoesophageal echocardiography provided an alternative, effective and non-invasive method for measurement of cardiac output in anaesthetized horses.